Louisville

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Kentucky Derby hopeful Vicar's in Trouble gets a bath after a morning workout at Churchill Downs Tuesday, April 29, 2014, in Louisville, Ky. (AP Photo/Charlie Riedel)

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Exercise rider Dana Barnes takes Kentucky Derby entrant Chitu for a morning workout at Churchill Downs Thursday, May 1, 2014, in Louisville, Ky. (AP Photo/Morry Gash)

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Jockey Rosie Napravnik, right, works Kentucky Derby hopeful Vicar's in Trouble with a stablemate at Churchill Downs in Louisville, Ky., Saturday, April 26, 2014. (AP Photo/Garry Jones)